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prisoha [69]
3 years ago
10

If a number is positive, then it’s square is positive

Mathematics
2 answers:
8_murik_8 [283]3 years ago
5 0
Yes.
+ x + = +
- x + = -
- x - = +
NNADVOKAT [17]3 years ago
3 0

Answer:

Yes, because of the fact that (+)(+)=+, but (-)(+)=-

Step-by-step explanation:

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Ben and Alyssa play a game in which they earn the same number of points for each goal and lose the same number of points for eac
Nadya [2.5K]

Answer:

Each goal gives 5 points and a penalty costs 7 points.

Step-by-step explanation:

Let a penalty cost = x points

And a goal gives = y points

Ben makes 7 goals and 2 penalties ending the game with 21 points,

7y - 2x = 21 --------(1)

Alyssa makes 10 goals and 8 penalties ending the game with (-6) points,

10y - 8x = -6

5y - 4x = -3 --------(2)

Equation (1) multiplied by 2, then subtracted from equation (2),

(5y - 4x) - 2(7y - 2x) = -3 - 2(21)

5y - 4x - 14y + 4x = -3 - 42

-9y = -45

y = 5

From equation (1)

7(5) - 2x = 21

35 - 2x = 21

2x = 35 - 21

2x = 14

x = 7

Therefore, each goal gives 5 points and a penalty costs 7 points.

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2 years ago
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Nastasia [14]

Answer:

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Step-by-step explanation:

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3 0
3 years ago
What is the center of the data in the dot plot? Number of Minutes to Finish the Quiz mc010-1.jpg
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The answer is 13. Or the third choice, just took the test.
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How would 2.25 be represented as a percent? A. 225% B. 22.5% C. 2.25% D. 0.0225
ivolga24 [154]

Answer:

A

Step-by-step explanation:

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6 0
2 years ago
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